Fixed animation issue of TimetableItemDetailScreenTopAppBar

[tepi0820]

Issue

• close Improve collapsing animation on timetable item detail screen #372

Overview (Required)

• The animation of the timetable detail's top app bar is a little weird, so this fix will make the animation smoother.
• I have tested out first six sessions' titles to check the behavior. Since max lines of the headline is two, I thought it would be enough if I check cases where the headlines are one or two, but if I should have checked another cases please let me know.

Movie (Optional)

Before	After
Screen_recording_20230904_160514.mp4	Screen_recording_20230904_155858.mp4

[github-actions]

Hi @tepi0820! Codes seem to be unformatted. To resolve this issue, please run ./gradlew detekt --auto-correct and fix the results of ./gradlew lintDebug.. Thank you for your contribution.

[github-actions]

Snapshot diff report

File name	Image
TimetableItemDetailS creenTest.checkLaunc hAccessibilityShot_c ompare.png

[github-actions]

Test Results

209 tests   209 ✔️  6m 54s ⏱️
  11 suites      0 💤
  11 files        0 ❌

Results for commit 4a42939.

♻️ This comment has been updated with latest results.

[tepi0820]

Sorry, I ran ./gradlew detekt --auto-correct and fixed the issue detected by GitHub Action.
f91ee7f

[takahirom]

Looks great! Thanks for the smooth animation!